ANSI X12 Test Data

Synthetic ANSI X12 837P documents with complete ISA/GS/ST envelopes.

Format: ANSI X12 837P · Licence: CC0-1.0, synthetic

What it is

Structurally complete X12 837P claim documents (ISA, GS, ST, BHT, NM1, CLM, SE, GE, IEA) with varying control numbers. Synthetic claims; not real patients or payers.

Downloads

Size	Rows	Formats
Small	25 rows	.json · .csv
Medium	250 rows	.json · .csv
Large	2,500 rows	.json · .csv

Cite this dataset

If you use this data in a post, paper, or tool, please cite it with the DOI:

StanzaAPI. (2026). ANSI X12 Test Data. CC0-1.0.
DOI: 10.5281/zenodo.23076203
https://stanzaapi.com/datasets/x12

https://doi.org/10.5281/zenodo.23076203

Columns

Key	Meaning
`control_number`	Interchange control number
`transaction_set`	Transaction set
`claim_id`	Claim ID
`document`	Document

Frequently Asked Questions

Is this ANSI X12 837P test data free to use?

Yes. The rows are released under CC0-1.0, so you can copy, modify, and redistribute them without attribution.

Is the data real?

No. All rows are synthetic. Values are structurally shaped for the format and are clearly marked synthetic. They are not real accounts, patients, devices, or registrations.

How is the dataset generated?

Deterministically from a fixed seed, so the same size always produces the same rows. That makes it safe to pin in a fixture or CI pipeline.